Device for preventing the flattening of the ends of pipe.



No. 860,897; PATEITTED JULY 23, 1907. G. G. & R. 0.'BLAKBY. 'DEVIGBFOR PREVENTING THE FLATTENING OF THE ENDSOF PIPE.

APPLICATION FILED JAN.27,1906.

WITNESS; T 9 INVENTORS .aw/ Wt! 6%60. will AT-I'O RNEYE:

To all whom it may concern:

llNl ED' STAES ANT ossrcn. v

GEORGE G. BLAKEY AND ROBERT O..BLAKEY, OF PITTSBURG, PENNSYLVANIA.

DEVICE FOR PREVENTING THE FLATTENING OF. THE ENDS OF PIPE.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed January 27,1906. Serial No. 298,111.

residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Devices for Preventing the Flattening of the Ends of Pipe, of which the following is a specification. I

Our invention relates to devices for preventing the flattening of the ends-of pip'e, whether they are thread: edor urithreaded and it is the object of our invention to extend the protection for a considerable distance from the ends of the pipe so that no flattening of the ends can occur so as to cause leaks after the pipes have been coupled together.

It is desirable with all kinds of pipe couplings that the ends of the pipe be kept exactly round, Whether the couplings are screwed to the ends of the pipes or are slipped over the ends of the pipes and calked with lead or other material. In either case the flattening of the pipe distorts it so that the coupling does not fit as well and may entirely prevent the coupling being screwed on or slid over the pipe ends.

Referring to the drawings which accompany this specification and form a part of the same, Figure 1 is a longitudinal section showing our invention ap plied to a threaded pipe end; Fig. 2, a similar section showing the same applied to an unthreaded -pipe;

made of somewhat larger internal diameter .than the, I remainder of the sleeve and this larger portion contains therein a metallic ring or collar 4 provided withthe ribs '5 which extend around the interior surface of the collar. This metal collar is preferably made of a piece of meta'l bent to circular form with the ends lying opposite each other'as shown in Fig. 5. This piece of metal is bent laterally also so that the ribs at the meeting ends do not standopposite each other but are arranged so as to form screw threads, whereby the collar may be screw ed on the threads of the pipe as shown in Fig. l, or upon the unthreaded end of the pipe as shown in Fig. 2. Where the pipe end is unthreaded the fit should be made tight enough to cause the ribs to bite slightly into the metal of the pipe. Preferably the sleeve 3 isheated so as to expand the same and'the collar is then inserted within the same,

the sleeve shrinking during the cooling so as to permanently connect together the sleeve and collar.

In Fig. 3 we have shown the sleeve provided with protecting ribs 6 on the exterior of thelsame which willstiffen it so as to prevent its breaking or bending. If preferred the sleeve may be exteriorly formed with off-set portions 7 and 8, whereby, all portions of the sleeve will have substantially the same thickness.

vThe number of the ribs5 may be varied as in many.

concerned is merely to hold the sleeve in place and,

threads on the pipe ends are not essential to hold the collar, as the threads on the collar will bite into the pipe-ends sufiiciently to hold it thereon.

Having described our invention, we claim- In a device for preventing the flattening of pipe ends,.a

-sleeve adapted to be removably placed on a pipe end and having sufficient thickness'rto prevent the ln'deutatiouof the pipe end, the sleeve being interior-1y enlarged from one end so as to form an annularrecess, and a threaded collar adapted to be slid endwise into the said recess and secured therein.

Signed at Pittsburg, Pa., this 22nd day of-January, 1906.

GEORGE G. BLAKEY. ROBERT D. BLAKEY.

Witnesses:

F. N. BARBER, C. E. Eoomzs. 

